Public Land Survey System. The survey system used in the original land survey conducted by the U.S. Government in order to transfer title of federally owned land. Its major divisions are townships, ranges, sections, government lots and divisions of sections. The PLSS is important in land ownership descriptions, but its section corners may or may not have geodetic control coordinates (coordinates representing a position on the earth in an established coordinate system) established for them.
Public land survey system. A rectangular survey system that utilizes 6-mile-square townships as its basic survey unit. The location of townships is controlled by baselines and meridians running parallel to latitude and longitude lines. Townships are defined by range lines running parallel (north-south) to meridians and township lines running parallel (east-west) to baselines. The PLSS was established in the United States by the Land Ordinance of 1785.3
Portable Life Support System. Pronounced "pliss". The lower portion of an astronaut's space suit backpack containing breathing oxygen, the cooling system, communications gear, and batteries to power the space suit.
Public Land Survey System. A reference scheme for recording property ownership by section, township, range, and aliquot parts (half or quarter sections) in the United States. The PLSS was laid out during the settlement of the country, dividing land areas into townships of 36 one-square mile sections.